Malicious PDF — malware analysis report

Static analysis result for SHA-256 a661e1eb9b83fad5…

MALICIOUS

PDF

50.7 KB
MD5: b12fd967135c77fcb6dc2844f17f4803 SHA-1: 962a4013cceaadd29a53901019b10a3c247aa113 SHA-256: a661e1eb9b83fad5751dc369d1a85e9fa85b9b815cfbfdf1c091bb9922d2d0b2
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded script payload, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic and the presence of an embedded artifact. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically targeting PDF vulnerabilities (Pdf.Exploit.Agent-6136306-0). The XFA form structure further supports this, as XFA is often abused for exploit delivery. The embedded script is likely responsible for downloading and executing a secondary payload, although its exact function cannot be determined without further analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-6136306-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-6136306-0
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_pdf_script_00000240.bin
3af17ea24497a8b81eea80aac0eb6ef2cc874e956fedd5f486a35df8678ef2d9		 pdf-embedded-script PDF raw stream script payload at offset 0x240 51212 bytes

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